摩洛哥布里格里格河谷斜拉桥设计与技术特点

布里格里格河谷斜拉桥项目位于摩洛哥王国境内拉巴特绕城高速公路上,离首都拉巴特市区30km。大桥全长951.66m,主桥采用(183+376+183)m叠合梁斜拉桥,桥塔和主梁在塔、梁交接处固结。斜拉桥主梁采用边主梁结构,混凝土边主梁之间通过金属横梁连接,金属横梁上安装预制混凝土桥面板,桥面宽29.82m。梭形混凝土桥塔由四肢分离式曲线型塔柱组成,造型优美,塔墩基础均采用扩大基础。全桥共设80对斜拉索,采用平行钢绞线拉索体系,空间呈扇形索面布置。主梁0号块在桥塔处的临时支架上施工,主梁标准节段采用牵索挂篮施工工艺。

Design and Technical Feature of Cable-Stayed Bridge over Bouregreg River in Morocco

The Cable-Stayed Bridge over Bouregreg River carries part of the Rabat Ring Expressway in Morocco,30 km to Rabat downtown.The Bridge has a total length of 951.66 m,of which the main bridge is a(183+376+183)m composite girder cable-stayed bridge with fixed connection at the juncture of the pylon and the girder.The main girder of the cable-stayed bridge is designed as concrete edge girder structure,connected metallic cross beams and precast concrete slab upon.The bridge deck width is up to 29.82 m.The shuttle-shaped concrete pylon sitting on spread foundation has four separate curved legs,revealing elegant outline.A total of 80 pairs of stay cables are tensioned for the bridge,the stay cables are made up of parallel steel strands and arranged in fan cable planes.The No.0 block of the main girder is erected on the provisional supports at the pylon,and the standard segments of the main girder are erected by guyed form travelers.